Arithmetic and control unit



FIG. 1 is a perspective view of an arithmetic and control unit showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof.

Portions of FIGS. 1-6 that are shown as broken lines are for illustrative purpose only and form no part of the claimed design. 

The ornamental design for an arithmetic and control unit, as shown and described. 